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PTE Test Reveiw
Test Review for PTE and Atomic Str Test
Question | Answer |
---|---|
WHAT IS THE PERIODIC TABLE? | A CHART USED TO ORGANIZE ELEMENTS INTO GROUPS AND PERIODS |
WHAT ARE THE COLUMNS ON THE PERIODIC TABLE CALLED? | GROUPS OR FAMILIES |
WHAT DO GROUPS ON THE PERIODIC TABLE HAVE IN COMMON? | THEY HAVE THE SAME NUMBER OF VALENCE ELECTRONS SO THEY HAVE SIMILAR CHEMICAL AND PHYSICAL PROPERTIES |
WHAT DO PERIODS ON THE PERIODIC TABLE HAVE IN COMMON? | THEY HAVE THE SAME NUMBER OF ENERGY LEVELS (SHELLS) TO HOLD THEIR ELECTRONS |
WHAT IS THE MOST REACTIVE GROUP OF METALS ON THE PERIODIC TABLE? | ALKALI METALS - GROUP 1 - THEY ONLY HAVE ONE VALENCE ELECTRON |
WHAT IS THE MOST STABLE GROUP/FAMILY ON THE PERIODIC TABLE? | NOBEL GASSES - GROUP 18 |
WHY ARE NOBEL GASES UNREACTIVE? | THEIR VALENCE SHELL IS FULL - THEY HAVE 8 VALENCE ELECTRONS |
HOW MANY VALENCE ELECTRONS DO ATOMS NEED IN ORDER TO BE THE MOST STABLE? | 8 |
HOW MANY VALENCE ELECTRONS DOES CHLORINE HAVE? | 7 |
HOW MANY VALENCE ELECTRONS DOES SILICON HAVE? | 4 |
HOW MANY VALENCE ELECTRONS DOES FRANCIUM HAVE? | 1 |
WHAT IS THE OVERALL CHARGE OF THE NUCLEUS? | POSITIVE |
WHAT IS THE OVERALL CHARGE OF THE ELECTRON CLOUD? | NEGATIVE |
HOW DO YOU KNOW HOW MANY PROTONS AN ATOM HAS? | LOOK AT THE ATOMIC NUMBER |
HOW DO YOU FIND THE NUMBER OF ELECTRONS AN ATOM HAS? | LOOK AT THE ATOMIC NUMBER - ASSUME ATOM IS NEUTRAL SO # OF PROTONS = # OF ELECTRONS |
HOW DO YOU FIND THE NUMBER OF NEUTRONS AN ATOM HAS? | ROUND THE MASS THEN SUBTRACT THE ATOMIC NUMBER |
HOW MANY PROTONS DOES SODUIM HAVE? | 11 |
HOW MANY ELECTRONS DOES SODIUM HAVE? | 11 |
HOW MANY NEUTRONS DOES SODIUM HAVE? | 12 |
FLUORINE HAS 7 VALENCE ELECTRONS AND LITHIUM HAS 1 VALENCE ELECTRON - HOW WILL THEY REACT? | FLUORINE WILL GAIN LITHIUMS 1 ELECTRON |
WOULD YOU EXPECT FLUORINE TO REACT WITH MAGNESIUM? | NO - FLUORINE ONLY NEEDS TO GAIN 1 ELECTRON IN ITS VALENCE SHELL AND MAGNESIUM NEEDS TO LOOSE 2 |
HOW DO YOU KNOW IF AN ATOM WILL GAIN, LOOSE, OR SHARE ELECTRONS? | IF AN ATOM HAS 1,2, OR 3 VALENCE ELECTRONS IT WILL LOOSE ELECTRONS. IF AN ATOM HAS 4 VALENCE ELECTRONS IT WILL SHARE, AND IF AN ATOM HAS 5,6, OR 7 VALENCE ELECTRONS IT WILL GAIN |
WHAT NOBEL GAS HAS 6 ENERGY LEVELS FOR THEIR ELECTRONS? | RADON |
NAME THE ELEMENT THAT IS GROUP 14 PERIOD 3 | SILICON |
A SCIENTIST IS LOOKING FOR AN ELEMENT THAT REACTS LIKE MAGNESIUM BUT HAS A LOWER ATOMIC MASS - WHAT WOULD YOU RECOMMEND? | BERYLLIUM |
WHAT IS MORE SIMILAR TO BISMUTH - NITROGEN OR CAESIUM? | NITROGEN - THEY ARE IN SAME FAMILY |
HOW IS THE PERIODIC TABLE ORGANIZED? | BY ATOMIC NUMBER |
HOW CAN YOU FIND THE NUMBER OF ELECTRONS A NEUTRAL ATOM HAS? | LOOK AT THE ATOMIC NUMBER, IF NEUTRAL PROTONS = ELECTRONS |
WHAT DETERMINES AN ELEMENTS IDENTITY? | PROTONS |
WHAT DETERMINES AN ELEMENTS REACTIVITY? | VALENCE ELECTRONS |